Checklist for the sustainable charging station/wall box

The charging station of the future works efficiently and cost-effectively with intelligent load management. It supports bi-directional communication with the vehicle in accordance with ISO 15118 and is updatable. In addition, it also meets the requirements of the German Measurement and Calibration Act in applications where electricity consumption is calculated on the basis of kWh.

AC charging is the most frequent type of charging as it has the major advantage that the existing AC 230 V/400 V power supply can be used and the charging infrastructure can even be connected to it by an electrical fitter. AC charging stations are also much more economical than DC charging stations. AC charging stations can be found in locations such as homes, in hotels, public car parks or workplaces.

Ask your provider about the following criteria:

Questions? Contact us!

Number

How many charging stations are required?

It can be assumed that there will be increasing regulations for parking spaces with a charging infrastructure, at least in public areas. Car parks should therefore be prepared for e-mobility.

System monitoring software (e.g. Cloud service)

Centralised monitoring is recommended when a large number of charging points are operated. Service measures and maintenance can therefore be effectively planned and an evaluation can help optimise the use of existing and future charging points. This also means that centralised control is possible.

Dynamic load management (DLM) is required if a critical number of charge controllers for the power supply is reached (see charge controllers, section on “DLM”).

Type of charging/charging modes

Decision concerning the type of charging/charging modes at charging stations

Deciding between AC and DC charging also means deciding between rapid charging with high procurement costs at the charging point and slower charging at a much more economical charging station. This decision can easily be made with regard to the use of charging parking areas: AC charging is sufficient in areas in which the charging station is used as a side benefit of parking rather than a stopping point to recharge. This type of charging is becoming more likely as the charging infrastructure expands, particularly when not all vehicles are designed for DC charging.

Recommendation for use at home, in hotels or in the work place: Charging station/ wall box AC charging (mode 3)

AC charging uses the standard single-phase or 3-phase low-voltage system which means that the required charging infrastructure can be maintained relatively easily. Sustainable planning: Charging stations have a lifespan of several years and it is therefore advisable to equip AC charging stations with charging power between 11 and 22 kW. Charging power of less than 12 kW

In Germany, charging stations with a charging power of less than 12 kW have to be reported to the grid operator.

Charging power 12-22 kW

In Germany, charging stations with a charging power of more than 12 kW are subject to the approval of the grid operator.

Recommendation for larger charging stations and rapid charging stations: Rapid charging with mode 4 (DC charging)

DC charging stations place the most complex and expensive demands on the electrical infrastructure in order to supply the necessary power. An unearthed power supply system is generally used when charging with direct current. For DC charging, direct voltage is applied to the series-connected batteries. In order to guarantee a flow of electricity, the voltage applied must be adjusted to always be slightly higher than the current cell voltage of the series-connected batteries. This requires a complex charging adjustment as currents of several 100 A may occur. The battery can be recharged within a few minutes using this procedure. This concept is particularly suitable for recharging a vehicle quickly when breaking a journey in a motorway service area, for example.
Level of available charging power

Recommendation for DC charging stations: A charging power of 150 kW is now considered as standard. However, it should also be possible for the charging power to be increased at a later stage. The charging power can be increased to up to 150 kW and the intention is for it to reach 350 kW in future.

Electrical infrastructure that provides the necessary power Electrical safety – Insulation monitoring in the charging station

To prevent the insulation monitoring devices in the vehicle and in the charging station from influencing each other, the insulation monitoring device in the vehicle is usually deactivated during the charging process. The insulation monitoring device in the charging station then monitors the entire charge current circuit to detect any symmetrical and asymmetrical insulation faults during and prior to charging.

DC charging stations are subject to the approval of the grid operator.

Plug or cable?

Mounted connecting cable

Vehicle owners do not require their own charging cable if a mounted connecting cable is used. However, this determines the type of plug, which means that an adapter may be required.
Providing cable brackets Avoiding tripping hazards Providing cable theft protection

Type 2 socket

European standard for the use of mode 3 charging cables (See section below on “Universal charging plug control/actuator control” for information on requirements for charge controllers) Protecting the plug with a shutter in the plug enclosure Locking the plug in the socket during charging (protects against theft and prevents unintentional interruption of charging by third parties) Important note: The plug must have an emergency release in the event of a power failure

DC charging: CCS and/or CHAdeMO

Charge controller requirements

The most important technical functions of the charging station are determined by the properties of the charge controller.

Operation and maintenance

Predictive planning also takes into account the period after the commissioning of the charging station

Guaranteeing the electrical safety of the charging points through regular checks Are the charging stations guaranteed to be easily accessible during maintenance activities? Who is responsible for DGUV V3 checks? Who is responsible for technical support? Do sufficient documents/operating instructions exist for the charging station?

Market segment brochure: eMobility
Parking and refuelling at the same time - more dynamics for e-mobility
The 'Street lamp charger' is coming
Connection of charging stations for electric vehicles
Flyer: Expert package
Flyer: Calibration law
Datasheet: CC612 EV charge controller
Checklist for a sustainable charging station/wallbox
Sustainable charging stations from ebee
Tender text: Specification for sustainable charging stations
Tender text: CC612
Technical paper: Charging Electric Vehicles - Protection against Electric Shock by DC Fault Current Sensor Units
Technical paper: Connection of charging stations for electric vehicles

For more information on ebee charging stations please contact:

Ebee Smart Technologies GmbH
Torgauer Straße 12-15 | 10829 Berlin

Tel.: +49 30 609 8371-0
Fax: +49 30 609 8371-99

E-Mail: sales@remove-this.ebee.berlin
www.ebee.berlin

Feel free to contact us if you require information about our charge controller.

Bender GmbH & Co. KG
Postfach 1161 | 35301 Grünberg
Londorfer Straße 65 | 35305 Grünberg

Tel.: +49 6401 807-0
Fax: +49 6401 807-259

E-Mail: emobility@remove-this.bender.de
www.bender.de

Checklist for the sustainable charging station/wall box

Questions? Contact us!

Number

How many charging stations are required?

Location

What are the requirements associated with the location of the charging station?

Private: In a private house or apartment for personal use

Semi-public: Apartment buildings for tenants, in firms for employees and customers

Public: Public parking areas, multi-storey car parks